Hadoop command not found in terminal

Question

I am trying to install Hadoop in ubuntu after setting these lines in the .bashrc of Hadoop installation

export HADOOP_HOME="/Desktop/hadoop-1.2.1"
set PATH ="$PATH:$HADOOP_HOME/bin"
export PATH

I wrote in the terminal

hadoop version

I got:

hadoop: command not found

Answer 1

The line:

set PATH ="$PATH:$HADOOP_HOME/bin"

is not what you think it means in bash . In Bash set is used for many things, but not for assigning variables. That line actually sets the command-line arguments ( unnamed parameters ) accessed as $1 and $2 .

You probably mean:

export HADOOP_HOME="/Desktop/hadoop-1.2.1"
export PATH="$PATH:$HADOOP_HOME/bin"

Note that spaces are not allowed around the = .

Make sure you then "source" the .bashrc file before testing.